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Arcade - Return INFO for value from list

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1
a month ago
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Luciečervená
by
Emerging Contributor
a month ago

Hi,

I'm kinda noob in arcade. I'm trying to achieve an interactive map where a person clicks on a parcel and pop-up shown information about whether the land is affected by any restrictions or what land-use it is in. Unfortunately, a parcel can be in two or more land-uses/study area etc. and I don't know how to display information for more than one variable.

Showcase is for study area. I'm using arcgis online map viewer pop-up arcade ("newly" allowing use html).

  • If parcel is in 0 studia area, pop-up shows nothing (correct),
  • if <0 or =100 area of parcel is in 1 study, pop-up shows how much % of area of parcel is in study area + info for the study + common info for all studies (correct)
  • if cnt > 1 it show header (hlavicka) of table + common info for all studies but nothing between

I would like to achieve of format:

■ X% of parcel in STUDY AREA:

US.01

US.02

■ Insert study US.01 info

■ Insert study US.02 info

■ Common info for all studies


I know its kinda confused in "var DefUS01 = IIF(percentage > 0 && US_info == 'US.01'" because if it's cnt > 1 → US_info is in format:

US.0X

US.0X

so it's not gonna find any match. If i ty to use IIF(percentage > 0 && Find('US.01', US_info) it's failing too. I need something to to say "if % of area is bigger than 0 and you find value US.01 in US_info return text.


It's even possible to achieve something like this without changing attribute table for easier value calling?

 

var prunik = Intersects((FeatureSetByName($map, "Územní studie")), $feature);
var cnt = Count(prunik);
var intersectArea = 0;

/////////Calling study ID + info
var US_info = ""
for (var US in prunik) {
  if (US_info == "") { US_info = US.Id; }
  else { US_info += "<br>" + US.Id; } }

if (cnt > 0) { 
    // we have overlap
    for (var prunikArea in prunik) {
        // intersect with polygon, and add area to the total
        intersectArea += Area(Intersection($feature, prunikArea), "vymeraparcely");
    }
    // calculate the percentage of overlap
    var zoneArea = Area($feature, "vymeraparcely");
    var percentage = Round(intersectArea * 100.0 / zoneArea, 1);
    // format the resulting text for > 0 < 100
    var result = "<tr><td>■ " + percentage + "% of parcel in <strong>STUDY AREA - " + US_info + "</strong>. " + "</td></tr>"; 
    //format conditions for final text
    var hlavicka = IIF(percentage > 0, "<table><tr><th>Územní studie</th>", "")
    var RegIN100 = IIf(percentage == 100, "<tr><td>■  Parcel in <strong>STUDY AREA  - " + US_info + ". " + "</strong></td></tr>", "")
    var RegIN = IIF(percentage > 0 && percentage < 100, result, "")
    var konec = IIF(percentage > 0, "</table>", "")
    var DefUS01 = IIF(percentage > 0 && US_info == 'US.01', "<tr><td><br>■ <u>Insert study US.01 info</u></tr></td>", "" )
    var DefUS02 = IIF(percentage > 0 && US_info == 'US.02', "<tr><td><br>■ <u>Insert study US.02 info</u></tr></td>", "" )
    var DefUS04 = IIF(percentage > 0 && US_info == 'US.04', "<tr><td><br>■ <u>Insert study US.04 info</u></tr></td>", "" )
    var DefUS05 = IIF(percentage > 0 && US_info == 'US.05', "<tr><td><br>■ <u>Insert study US.05 info</u></tr></td>", "" )
    var DefUS06 = IIF(percentage > 0 && US_info == 'US.06', "<tr><td><br>■ <u>Insert study US.06 info</u></tr></td>", "" )
    var DefUS07 = IIF(percentage > 0 && US_info == 'US.07', "<tr><td><br>■ <u>Insert study US.07 info</u></tr></td>", "" )
    var OBECust = IIF(percentage > 0, "<tr><td><br>■ Common info for all studies</tr></td>", "")
}
///////// Final Text 
var finalText = hlavicka + RegIN + RegIN100 + DefUS01 + DefUS02 + DefUS04 + DefUS05 + DefUS06 + DefUS07 + OBECust + konec
return {
  type : 'text',
  text : finalText //this property supports html tags
}

 

If intersect with 2 study areas - not workingIf intersect with 2 study areas - not workingIf intersect with part of the study area - workingIf intersect with part of the study area - workingIf intersect with 1 study area (100% intersect) - workingIf intersect with 1 study area (100% intersect) - working

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1 Reply
JohnEvans6
by
Frequent Contributor
3 weeks ago

I meant to get to this today and ran out of time. I didn't get a chance to fully noodle through your script, but below is something where if you click a fire perimeter boundary, it will tell you which Census Tract(s) are under as well as the percent for each (one-to-many). I've tried to use ESRI data so you can make your own map. The expression goes on the current perimeters layer

// Boundaries : https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Census_Tracts/FeatureServer/0
// Fires : https://services9.arcgis.com/RHVPKKiFTONKtxq3/ArcGIS/rest/services/USA_Wildfires_v1/FeatureServer/1

var boundaries = FeatureSetByName($map, "USA Census Tract Boundaries",['*'], true)
var intersections = Intersects(Geometry($feature), boundaries)
var output_text = ''

for(var f in intersections) {

	var txt = ''
	var percent = ''
	var intersection_size = ''

	// What is the size of the area that intersects the tract and the fire perimeter
	intersection_size = Area(Intersection($feature, f), "acre")

	// What % of the fire perimeter is inside the tract?
	percent = Text(Round(intersection_size / Area(Geometry(f), "acre") * 100))

	// Create an individual line for each
	txt = Concatenate(['<p>', f['FIPS'],": is ", percent, "% affected by fire.", '</p>'])
	
	// Output
	output_text = output_text + txt
}

Console(output_text)

return { 
	type : 'text', 
	text : output_text
}

 

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